Dell PowerStore: Clustering and High Availability

1 dell powerstore : Clustering and High Availability October 2022 White Paper Abstract This white paper provides an overview of powerstore Clustering technology along with the highly available features of the platform for the PowerStoreOS releases. dell Technologies Copyright 2 dell powerstore : Clustering and High Availability The information in this publication is provided as is. dell Inc. makes no representations or warranties of any kind with respect to the information in this publication, and specifically disclaims implied warranties of merchantability or fitness for a particular purpose. Use, copying, and distribution of any software described in this publication requires an applicable software license. Copyright 2020-2022 dell Inc. or its subsidiaries. All Rights Reserved. dell Technologies, dell , EMC, dell EMC and other trademarks are trademarks of dell Inc.

2 Or its subsidiaries. Intel, the Intel logo, the Intel Inside logo and Xeon are trademarks of Intel Corporation in the and/or other countries. Other trademarks may be trademarks of their respective owners. Published in the USA October 2022 dell Inc. believes the information in this document is accurate as of its publication date. The information is subject to change without notice. Contents 3 dell powerstore : Clustering and High Availability Contents Executive summary .. 4 introduction .. 4 Clustering .. 7 High Availability .. 25 Conclusion .. 44 References .. 44 Executive summary 4 dell powerstore : Clustering and High Availability Executive summary This white paper describes the fully redundant hardware and high- Availability features that are available on dell powerstore . These features are designated to withstand component failures in the system and in the environment, such as network or power failures.

3 If an individual component fails, the storage system can remain online and continue to serve data. The system can also withstand multiple failures if they occur in separate component sets. After the administrator is alerted about the failure, they can order and replace the failed component without any impact. This document is intended for IT administrators, storage architects, partners, and dell Technologies employees. This audience also includes any individuals who evaluate, acquire, manage, operate, or design a dell networked storage environment using powerstore systems. Date Description April 2020 Initial release: PowerStoreOS September 2020 Updates to high Availability section; other minor updates April 2021 PowerStoreOS updates January 2022 PowerStoreOS updates; template update April 2022 PowerStoreOS updates July 2022 PowerStoreOS updates August 2022 Minor correction in the Distributed sparing section October 2022 PowerStoreOS updates dell Technologies and the authors of this document welcome your feedback on this document.

4 Contact the dell Technologies team by email. Author: Jonathan Tang, Ryan Meyer Note: For links to other documentation for this topic, see the powerstore Info Hub. introduction Having constant access to data is a critical component in any modern business. If data becomes inaccessible, business operations might be affected and can potentially cause revenue loss. Because of this, IT administrators are tasked with ensuring that every component in the data center has no single point of failure. This white paper details how to cluster powerstore systems and describes the high Availability features that are available on the powerstore system. powerstore is designed for Availability (based on the dell Technologies specification for powerstore , April 2020; actual system Availability might vary). Overview Audience Revisions We value your feedback Document purpose introduction 5 dell powerstore : Clustering and High Availability powerstore achieves new levels of value, flexibility, and simplicity in storage.

5 It uses a container-based microservices architecture, advanced storage technologies, and integrated machine learning to unlock the power of your data. It is a versatile platform with a performance-centric design that delivers scale-up and scale-out capabilities, always-on data reduction, and support for next-generation media. powerstore brings the simplicity of the public cloud to on-premises infrastructure, streamlining operations with an integrated machine learning engine and seamless automation. It offers predictive analytics to easily monitor, analyze, and troubleshoot the environment. powerstore is highly adaptable, providing the flexibility to host specialized workloads directly on the appliance and modernize infrastructure without disruption. It also offers investment protection through flexible payment solutions.

6 The following table provides definitions for some of the terms that are used in this document. Table 1. Terminology Term Definition Appliance Solution containing the base enclosure and any attached expansion enclosures. Base enclosure Used to reference the enclosure containing both Nodes (Node A and Node B) and 25x NVMe drive slots. Cluster One or more appliances in a single grouping and management interface. Clusters are expandable by adding more appliances to the existing cluster, up to the allowed amount for a cluster. Expansion enclosure Enclosures that can be attached to a base enclosure to provide additional storage. Fibre Channel (FC) protocol A protocol used to perform Internet Protocol (IP) and Small Computer Systems Interface (SCSI) commands over a Fibre Channel network. File system A storage resource that can be accessed through file-sharing protocols such as SMB or NFS.

7 Internet SCSI (iSCSI) Provides a mechanism for accessing block-level data storage over network connections. Intra-cluster Management (ICM) Network An internal management network that provides continuous management connectivity between appliances in the powerstore cluster. Intra-cluster Data (ICD) Network An internal network that provides continuous storage connectivity between appliances in the powerstore cluster. Network-attached storage (NAS) server A virtualized network-attached storage server that uses the SMB, NFS, FTP, and SFTP protocols to catalog, organize, and transfer files within file system shares and exports. A NAS server, the basis for multitenancy, must be created before you can create file-level storage resources. NAS servers are responsible for the configuration parameters on the set of file systems that it serves.

8 powerstore product overview Terminology introduction 6 dell powerstore : Clustering and High Availability Term Definition Network File System (NFS) An access protocol that allows data access from Linux/UNIX hosts on a network. Node Component within an appliance that contains processors and memory. Each appliance consists of two nodes. NVMe over Fibre Channel (NVMe/FC) Protocol used to perform Non-Volatile Memory Express (NVMe) commands over a Fibre Channel network. NVMe over TCP (NVMe/TCP) Protocol used to perform Non-Volatile Memory Express (NVMe) commands over an Ethernet network. powerstore Command Line Interface (PSTCLI) An interface that allows a user to perform tasks on the storage system by typing commands instead of using the UI. powerstore Manager An HTML5 user interface used to manage powerstore systems. powerstore T model Container-based storage system that is running on purpose-built hardware.

9 This storage system supports unified (block and file) workloads, or block-optimized workloads. powerstore X model Container-based storage system that is running inside a virtual machine that is deployed on a VMware hypervisor. In addition to the block-optimized workloads that this storage system offers, it also allows users to deploy applications to be deployed directly on the array. Representational State Transfer (REST) API A set of resources (objects), operations, and attributes that provide interactive, scripted, and programmatic management control of the powerstore cluster. Server Message Block (SMB) A network file sharing protocol, sometimes referred to as CIFS, used by Microsoft Windows environments. SMB is used to provide access to files and folders from Windows hosts on a network. Snapshot A point-in-time view of data stored on a storage resource.

10 A user can recover files from a snapshot, restore a storage resource from a snapshot, or clone the snapshot to provide access to a host. Storage Policy Based Management (SPBM) Using policies to control storage-related capabilities for a VM and ensure compliance throughout its life cycle. Volume A block-level storage device that can be shared out using a protocol such as iSCSI or Fibre Channel. vSphere Virtual Volumes (vVols) A VMware storage framework that allows VM data to be stored on individual Virtual Volumes. This ability allows for data services to be applied at a VM-level of granularity and according to SPBM. Virtual Volumes can also refer to the individual storage objects that are used to enable this functionality. vSphere API for Array Integration (VAAI) A VMware API that improves ESXi host utilization by offloading storage-related tasks to the storage system.